Cab end



- E. W. TEST.

CAREND. VAPPLICATION man mm. i919.

Patented Oct. 21', I919.

ELLIS W. TEST, OF MICHIGAN CITY, INDlIANA.

CAR END.

Specification of Letters Patent.

Patented Oct. 21, 1919.

Application filed May 5, 1919. Serial No. 294,797

To all whom 'z't may concern:

Be it known that I, ELLrs W. TEST, a citizen of the United States, and resident of Michigan City, county of Laportc, and State of Indiana, have invented certain new and useful Improvements in Car Ends, of which the following is a specification, and which are illustrated in the accompanying drawings, forming a part thereof.

This invention relates to car ends, and an object of the invention is the provision of a car end which will be more stiff, considering the amount of metal used, than car ends heretofore constructed.

Afurther object is the provision of a car end wherein the metal is placed to the best advantage,

Further objects of the invention will ap pear from the disclosure of the specification and the drawings accompanying and forming a part thereof, in which Figure 1 is a side elevation;

F'g. 2 is a vertical section on line 2-2 of *ig. 1; and

Fig. 3 is a horizontal section on line 3-3 of Fig. 1.

The car end illustrated is of the type made of sheet metal, and is illustrated as made up of two sections 10 and 11, the upper section overlapping the lower section, as at 12, and secured thereto by rivets 13. It will be observed that the upper plate at the joint lies outside the lower plate, so as the more effectually to shed water.

To increase the stiffness of the plates a corrugation is shown which, in the finished structure, assumes the form of a spiral havmg one end at 14 and the other end at 15, the

latter lying at the center of the spiral.

When the plate is made in two sections, as illustrated, one-half of the spiral will be formed in each plate, and When assembled the corrugations will nest witheach other, forming a joint of great strength and rigidity. In the corners of the plate to which the spiral aforesaid. does not reach, are placed supplemental corrugations 16. These supplemental corrugations are preferably concentric with the turns of the spiral corrugation.

As illustrated in Fig. 3 the metal of the plate is thicker at the center, as at 17, than at the margins, as 18. Moreover, the car end as a whole is constrlwtcd with the metal thicker at the lower margin, s 19, than at the upper margin, as 20. This relative thickness plainly appears from the sectional view of Fig. 2.

The use of a spiral corrugation is found to have distinct advantages over that of any other form of corrugation s uch as concentric circles, diagonal corrugations, or the like, since a pressure tending to force the plate out of its plane at any point is resisted not only by the metal at that point but by the necessity of a lateral bending of the corrugation, which bending would not occur in a corrugation made up of concentric circles. The action referred to is illustrated by the difficulty of pulling the center coils of a spiral spring, such as a clock spring, for instance, out of the plane of the spring, whereas the action of a corrugation made up of concentric circles is quite analogous to the action of the plates utilized in the manufacture of aneroid barometers, wherein corrugations composed of concentric circles are utilized for the express purpose of a ready deflection of the center of the plate.

The shape of the corrugation has been described as a spiral. This term is intended to be understood as referring to a corrugation which is continuous from the center to the margins of the plate, and need not be a true spiral in the strictmathcmatical sense.

The extent of the plane surface of the plate inclosed within the spiral, or lying bctween its convolutions, may be varied ac cording to the judgment of the manufacturer without departing from the spirit of my invention.

I claim as my inventi0n-.

1. Car sheathing comprising a sheet metal structure having a spiral corrugation formed therein.

2. Car sheathing comprising a sheet metal structure having a spiral corrugation formed therein, the circumference of the spiral being adjacent the edges of the structure and the center of the spiral at the approximate center of the structure.

3. Car sheathing comprising a sheet metal structure, the stock composing which is formed into a'corrugation arranged in spiral formation, the diameter of the s ire! being substantially equal to the smal est .iateral dimension of the plate.

4-. Car sheathing comprising a plurality of plates each having corrpgations formed in the material thereof, the corrugations of said plates when assembled in overlapping relation adapted to nest with one another, the corrugation of the assembled structure being of spiral formation.

5. Car sheathing comprising a sheet metal structure having a spiral corrugation formed therein, the metal composing said structure being thicker at the center of the structure than at one margin thereof.

6. Car sheathing comprising a sheet metal structure having a spiral corrugation. formed therein, the metal composing said structure being thicker at its lower margin than at its upper margin.

7. Car sheathing comprising a plurality of plates each having corrugations formed in the material thereof, the corrugations of.

said plates when assembled in overlapping relation adapted to nest with one another,

the corrugation oi the assembled structure being of spiral formation, the metal of the lowermost plate being thicker than the metal of the uppermost plate.

8; Car sheathing comprising a plurality of plates each having corrugations formed in the material thereof, the corrugations of said plates when assembled in overlapping relation adapted to nest with one another, the corrugation of the assembled structure being of spiral formation, the metal of the lowermost plate being thicker than the metal of the uppermost plate, and the metal of the structure as a whole being thickest at its transverse central portion and tapering uniformly to a less thickness at its lateral margins.

9. Car sheathing comprising a sheet metal structure having a spiral corrugation formed therein, and supplemental segmental-shaped corrugations concentric with said spiral formed in the corners of said structure.

ELLIS W. TEST. 

